Fastener forming and driving machine.



S. E. DUNHAM.

FASTENER FORMING AND DRIVING MACHINE. APPLICATION FILED JAN. 8,-1908.

1,103,404. Patented July 14,1914.

4 SHEETS-SHEET 1.

WI Tl/ESSES Ill VEN T00 {:23 I EW/(WMW l TTOIiI/EY S. E. DUNHAM.FASTENER FORMING AND DRIVING MACHINE. APPLICATION FILED JAN. a, 1908.

1,103,404. Patented July 14, 1914.

4 SHEETS-SHEET 2. 4 0

III VEII 70R WITNESSES S. E. DUNHAM. FASTENER FORMING AND DRIVINGMACHINE. APPLICATION FILED JAN. 8, 190a.

1,103,404. Patented July 14,1914.

4 SHEETB-SHEET 3. M /7 j 57 5| 54 I E g 3.9) U 5 f 5 53 f j 5 5 s"IVE/{T08 5 MM 5 BIZ m4 WWW 1 I TTOIMEV S. E. DUNHAM. FASTENER FORMINGAND DRIVING MACHINE. APPLICATION FILED JAN. 5, 1908.

1,103,404. Patented July 14,1914.

4 SHEETS-SHEET 4.

'IIIIIIIIIIII IN VEN T0!) Arm/my SAMUEL E. Dunner/i; or new YORK, N. Y.

FAS'TENER FORMING Aim DRIVING MACHINE.

Specification of Letters Patent.

Application filed January 8, 1908. Serial No. 409,812.

To all whom, it may concern:

Be it known that I, SAMUEL E. DUNI-IAM, of the city of New York, boroughof Brooklyn, county of Kings, and State of New York, have inventedcertain new and useful Improvements in Fastener Forming and DrivingMachines, of which the following in a full, clear, and exactspecificatiomsuch as will enable others skilled in the art towhich itappertains to make and use the same.

My invention relates to a mechanism for forming and driving fasteners orlooks, particularly fasteners for joining two sections of wood to eachother. i

It is especially useful in the manufacture of wooden articles requiringtwo or more sections of wood to be joined'together, for

- example, in the construction o-fboxes, packing cases, picture frames,etc.

It further relates especially to the construction of fasteners orlocksfrom sections of sheet metal, which are automatically severed intothe necessary length and simultaneously crimped at the ends so that thecrimped or corrugated ends will, securely hold in the wood or othermaterial into. which the fasteners are driven.

In its general organization, the apparatus embodies a plunger head whichis periodically operated, manually or otherwise as desired, and which,by a peculiar gearing,im-

arts the necessary motion toa prime mover shaft which actuatessuccessively devices for feeding the stock, preferably from a roll ofmetallic ribbon, a set of dies for corrugating the stock; a knife forcutting off thestock to the desired length; a plunger which drives thefastener or look thus formed and which is attached to, and moves with,the plunger head; and a set of holder jaws which receive the fastener asit is formed and hold it during the driving operation.

The apparatus may be constructed of any number of units, to form anddrive one or more fasteners simultaneously. As here illustrated, it isshown with two units, although of course his may be varied indefinitely.

My invention involves various other fea tures of importance, all ofwhich will be fully set forth hereinafter and particularly pointed outin the claims.

Reference is had to the accompanying drawings, which illustrate, as anexample, one manner of practically embodying the principles of myinvention, in which drawmgs,

Figure 1 is a'front elevation of the .machine with parts broken away;Fig. 2 is a 1 plan view from below the plunger head show- }ingparticularly the stock rolls, the feeder devices and the prime moverside elevation of guide-wayin section; Fig. & is a fragmen- ,trating thefeeder and the dies for corrugatging the stock; Fig. 5 is a verticalsection on the line 5+5 of'Fig. 3, particularly illusby which thefastener is 6 is a sectional plan on 5; Fig. 7 is a detail of the andthe plunger ,driven home; Fig. the line 6-6 of Fig. Erace cam whichoperates iratchet motion by whichthe prime mover lshaft is driven fromthe plunger head; Fig. 9 .is a section of the same view illustrating themanner of driving the :fastener to join together two sections of detailsection of the fastener, showing pariticularly the sharpened edgethereof.

The machine in practice is provided with a suitable base, which supportstwo columns 15. The base is not shown in the drawings.

a guide-way 19 and in the guide-way are ad toward and from each other sothat they may be suited to the position of the fastener forming andholding devices and, moving with the plunger head, serve to drive homethe fasteners after they are formed, all of which will be fully setforth hereinafter. Attached to, and dependent from, the overshaft; Fig.3 is av the machine with the feeder tary plan View wlth parts in sectionillus- Etrating the devices for holding the fastener,

the feed; Fig. Sis fa detail of the rack and pinion and the devices;Fig. 10 is a wood or other material; and Fig. 11 is av lWith the base isassociated a treadle mech'a-i the plunger ingor overhanging arm 18. Thisarm has Patented July 14,'1914.; I

'justably mounted blocks 20, which carry the plungers 21. These plungersare adjustable hanging arm 18 of the plunger head is a rack 22.This'rack meshes with a pinion 23 loose o'n'the prime mover shaft 24, asshown best-in Figs.- 8 and 9. F astened to the pinv keyed to the primemover shaft 24. The

' until "the plungers I is'i mparted to the shaft is mounted to rotatein boxes 28 secured to a frame 29 which projects horizon tally from thestanchions 15, and the arrangement of the pawls 26 and shouldered collar2'1. issuchthat on thedownward motion of the plunger head, thepawls willrun idly over the shouldered collar and upon theupward motion, the pawlsmove toward the shoulders on the collar, but do not contact therewithand drive the collar and shaft 2l clear the fastener forming-devices,atwhich time the pawls strike the shoulders on the collar and thecollarand shaft 24 take up the rotationof the. pinion/23 and-disk 25, sothat .inotion riine mover shaft, from which motion the astener' formingdevices are operated. In this connection it will be seen that theshouldered collar27 is in the nature-of a ratchet, the ratchet having,however, two teeth and the parts being so dis posed that a suflicicntlost motion occurs to allow the. plungers to clear the fastener formingdevices on the uoward motion of the plunger head-before t e fastenerforminodevices are set in operation, Secured to reachrod rotate with theprime mover shaft 24 is a race cam 30, inwhich operates the pin 31 (see.Fig. 7) of a yoke 32 secured to or formed integral with'a reach-rod 33.The

projects horizontally rearward (see Fig.12). andis joined to across-head bar 34. .This bar operates the feeder de vices.

The mechanism shown in the drawings is [adapted for forming twofastenerssimultaneously, and hence there are two feeder devices.Obviously, however, the cross-head bar could be extended .indefinitelyand caused to operate any number of feeder devices, accor-din to thenumber of fasteners which the mac ine is'adapted to drive, in which casethe mechanism is simply duplicated for each fastener. c t

, According to the structure shown in the drawings, each'end of the bar34- carries a collar 35, and these collars have arms 36 projectingtherefrom and pivoted to the feed dogs 37. These dogs are arranged inpairs and are themselves pivoted on a car'- rier' block 88, which isadapted to slide horizontally'in a guide 39 projecting from the frame29. The stock is carried on reels 40, which are in number one for eachfastener that the machine is adapted to form. The

stock in the form of steel ribbons wound jspirit' of my invention.

in a roll on the reels 40, and the feed dogs 37 work at opposite sidesofthe stock,pinohing the stock'between their points and feeding itforward with each forward motion of As the cross-head bar movesbackward, it will be seen that the feed dogs will be turned on theirpivots to move away from the stock and then the carrier block 38 willmove backward in the slide-way 39. verse motionof the cross-head bar 34,how- .ever, the feed dogs will be returned to their rengagement with thestock, and then they ,3 will move forward with the carrier. block 38,the stock being gripped between the feed 5f dogs and being drawn forwardby the same. jThe stock being V passed into the devices for stamping orcore irugating'and cutting the fastener. As will 'jplicated for eachfastener which the ma- ,fchine is adapted to form, In aduplex machinesuch as shown in the drawings, there Zing or die devices, and to avoidconfusion. jonly' one willbeI specifically described, the

gother. I r i p As shown best in Fig. 4, the jaws of the die are two innumber and are designated ;41 and 41", of which'the jaw 41 is stationsgary, and 41 is themovable member. The istationary member is adjustablyheld in a part of the frame29 by'means of set screws 42, and the movablemember 41 is adapted ito slide: in said frame toward and from thefstationary member. iblade for cutting ofi the stock, and this .fworksin the frame 29'against a ledger blade 544. These blades are placedimmediately gahead of the jaws 41 and 41, so thatas the istock is fed bythe dogs 37, it is projected gbetween and is corrugated by the jaws ofthe fdie, (the shear blade being withdrawn as gshown in Fig. 4) andimmediately thereafter ithe shear blade advances, strokes over thetledger blade, and severs the stock into the gdesired length, as Fig. 4illustrates. Itwill be apparent, however, that this order of first bereversed, without departing from the The movable member 41 of the die isactuated by a leverc45 isuitably fulcrumed on the frame at 45 and isdriven by the cam 46 secured to the shaft i24, while the shear blade 43is driven through alever 47, fulcrumed as at 47, and is actuated by ashaft 24, said lever 45 and die member 41" iand said lever 47 and shearblade 43 being returned to their normal or inoperative positions by thecams 48 and 48 respectively, although it is obvious that these return'movements may be effected by means of the'cross-head bar 34 and itsconnections.

tbereadily understood, these devices are du;

iare two duplicate sets of cutting andstamp gcorruga'ting and thensevering the stock may cam 48 on the prime mover Upon re gdescrlptionofone applying equally tothe V In this manner the stock is fed, andsevered into lengths by a successive operations;

Referring now to Fig. 5, which shows suitable dies in vertical-sections,it will be seen that above these dies is a guide-way 49, forming part ofthe frame 29, and through this guide-way the before described plungers21 are adapted to operate. Below the dies 41 and 41 are arranged theholder jaws 50 and 51, of which the jaw 50 is stationary and the jaw 51is movable and held yieldingly in active position by means of the spring52, the tension of which may be adjusted by the set screw 53. As shownin Fig. 6, the movable holder jaw 51 is suitably mounted in the frame 29and guided by rods 54 although this is a detail of construction which isin no sense material. Below these holder jaws 50 and 51 is a work table55. This is supported on the column 15 and may be adjusted by means ofset screws 56 to adapt it to the position of the work. The work isindicated in Fig. 5 by the broken lines 57 WVhen the fastener is formedby the devices shown in Fig. 4, the plunger head should thereupondescend, either automatically in the event that the machine is of anautomatic character, or by hand or foot power, in the event that themachine is adapted to be manuallyfdriven. Upon the descent of theplunger head, the plunger or plungers 21 move through the guide orguides 49, pass between the dies 41 and 41, engage the fastener anddrive the same downwardpasses between the spring holder jaws 50 and 51,which yield to allow the motion of the fastener but which, nevertheless,press against the same with s'uflicient firmness to hold it true duringthe driving operation. The continuing motion of the plunger or plungerscarries the fastener through the holder jaws 50 and 51, the jaw 51yielding springs. corrugated series of rapidly to allow the plunger alsoto pass between the holder jaws and thereupon the fastener is driveninto the work, which is indicated at 57 in Fig. 5.

Fig. 10 shows an example of the work, whichis theresupposed to consistof two sections of wood to be united by the fastener driven into them.Obviously the machine may operate on a great many different kinds ofwork, that illustrated in the figure being offered merely as an example.

The organized operation of the machine may therefore be traced asfollows: The stock having been placed upon the reels 40 and the ends ofthe stock projected between the feed dogs 37 and the table 55 adjustedto the nature of the work which is placed thereon, upon the firstdownward motion of the plunger head-assuming no previous operation ofthe machinethe plungers will descend idly, and upon the return of the Atthis time the fastener plunger head, brought about by a spring orotherwise, the shaft 24 picks up the rotation of the pinion 23 throughthe medium ofthe pawl and ratchet devices heretofore described, and thefirst result of this motion is a backward motion of the feeding dogs,which is immediately followed by a forward motion of the feeding dogs,with the stock firmly held thereby, resulting in projecting the ends ofthe stock between the shear and ledger blades 43 and 44 and between thedie jaws 41 and 41, whereupon the movable jaw 41 advances against thestationary jaw 41, corrugating the stock and immediately thereafter theshear blade strokes over the ledger blade, severing the stock as shownin I Fig. 4 and completing the fastener. 1 time the operation of themechanism brought about by the upward motion of the plunger At this headceases and the fasteners thus formed are ready to be driven home. Theoperator then brings about a descent of the plunger head, which drivesthe plungers first through the guides 49 thence between the dies 41 and41, which by this time will have returned to their open position, the

plungers then engaging the fasteners and forcing them downward throughthe jaws 50 and 51 into the work. This completes a single operation ofthe mechanism, and the plunger head, with its plungers, thereuponreturns to its elevated position, resulting inthe formation of a secondfastener as above described.

Having thus described my invention, what ,I claim as new and desire tosecure by Letters Patent of the United States is:

1. In a machine for corrugating, cutting up and driving strips of metalinto wood, the combination of means acting to feed a metallic ribbon,opposing dies capable of acting on said metallic ribbon to corrugate thesame, means for severing the metallic ribbon into lengths, means fordriving the fastener thus formed edgewise into wood and opposing fiatfaced jaws, of which one is yielding, said jaws being located below thedies and arranged to hold the fastener during the driving operation.

2. In a machine for making and driving corrugated sheet metal fasteners,the combination of corrugating dies for forming a fastener, a yieldingmeans arranged to receive the fastener from the dies during the drivingoperation and a plunger operating between the dies and said yieldingmeans to drive the fastener edgewise into wood.v

3. A fastener forming and driving mechanism, comprising dies forcorrugating the fastener stock, of which dies one is movable, means foroperating the movable die, shear and ledger blades juxtaposed to thedies, means for operating the shear blade for the purpose specified, aplunger acting between the dies and arranged to drive the fastener 4-. Afastener forming and driving mechanism, comprising dies for corrugatingthe one is movable,

fastener stock, of Which dies means for operating the movable die, shearand ledger blades juxtaposed to the dies, means for operating the shearblade for the purpose specified, a plunger acting between the dies andarranged to drive the fastener edgevvise into Wood, and yielding devicesbelow the dies to receive and hold the fastener during the drivingoperation, such devices consisting in a stationary and a spring pressedjaw. i

5. A fastener forming and driving mechanism, comprising a plunger head,a plunger carried thereby and arranged to drive the fastener edgeWiseinto Wood, and devices for corrugating the fastener stock and cut tingthe same'into suitable lengths to form a fastener, such .corrugating andcutting devices being actuated by the return motion of the plunger head.

6. A fastener. forming and driving mechanism, comprising a plunger head,a plunger carried thereby and arranged to drive the fastener edgeWiseinto Wood, fastener forming devices, and a gear for actuating thefastener forming devices from the motion of the plunger head, such gearbeing idle on the active stroke of the plunger and having delayedoperation upon the return stroke of the plunger, to permit the plungerto clear the fastener the operation thereof.

7. In a machine for making and driving metal fasteners'edgevvise intoWood, the combination of devices for corrugating a strip of sheet metal,devices for cutting said strip into suitable lengths,- means for drivingthe fastener thus formed into wood, a feed device for feeding the stripof sheet metal to the corrugating, cutting and driving devices, saidfeed device comprising a slide, feed dogs pivoted thereon, and arrangedto oppose each other in operation, and an actuating device havingoperative connection with said feeding devices.

8. In a fastener forming and driving mechanism, the combination ofdevices for feeding a. strip' of sheet metal, devices for corrugatingsaid strip comprising dies juxtaposed to each other, of Which dies oneis movable, a lever arm connected With the movable die to operate thesame, a prime mover shaft, means carried by the prime mover shaft toactuate the lever arm, means :for actuating the prime mover shaft,devices for cutting the metal strip into suitable lengths to form afastener, and means for driving the fastener edgeWise into Wood.

9. In a fastener forming and driving mechanism, the combination ofdevices for metal fasteners,

. lengths to form the, fastener home, the metal strip to and drivingdevices,

forming devices before feeding a strip of sheet metal, devices forcorrugating said strip, devices for cutting said strip into suitablelengths to forma fastener, said devices comprising cutting bladesjuxtaposed to each other, of Which blades one is movable, a lever armconnected With the movable blade to operate the same,

a prlme mover shaft, means carried by the prime mover shaft to actuatethe lever arm, means for actuating the prlme'mover shaft,

and means for driving the fasteners edge- Wise' into Wood.

10. In a machine for making and driving the combination of devices forcorrugating a strip of sheet metal, devices for cutting said strip intosuitable fasteners, means for driving feed devices for feeding thecorrugating, cutting said feed devices comprlsing a reciprocating crosshead, a sliding barrier, feed dogs pivotally connected to the cross headand also pivotally connected to the sliding carrier, .a prnne movershaft,

means to impart intermittent reciprocating motion to the feed devicefrom the prime mover shaft, a plunger head,

an'dmeans to actuate the prime mover shaft from the motion of theplunger head.

.11. In a machine for makingand driving fasteners, the combination ofdevices for feeding the fastener stock, a plunger head, a plungercarried thereby and arranged to drive the fastener home, the plungerhead, a prime mover shaft, a

plnion loose thereon and meshed With the Track, pawl and ratchet devicesfor imparting intermittent rotary motion to the prime mover shaftthrough the pinion from the :motion of the plunger head,corrugating diesand cutting blades juxtaposed to each other and operated from the primemover shaft, said feeding devices-comprising a slide, feed dogs pivotedthereto and arranged to oppose each other in operation, and means foractuating said feed device from the prime mover shaft. v 12. In amachine for making and driving sheet metal fasteners, the combination ofdevices for feeding the fastener stock, devices for formingthe fastenertherefrom, a plunger head, a plunger carried thereby and arranged todrive the fastener home, a rack carried by the plunger head, a primemover shaft, a pinion loose thereon and 'meshed With the rack, pavvl andratchet devices for imparting through the pinion intermittent rotarymotion to the prime mover shaftfrom the motion of the'plunger head, saidfeeding devices comprising a slide, feed dogs pivoted thereto andarranged to oppose each other. in operation, means for impartingintermittent reciprocating motion to the feed devices from the primemover shaft, such means comprising a reach rod, a yoke connected arackcarried 1 by with the reach rod and a race cam carried by the primemover shaft, and means operatively connecting said yoke with said primemover shaft.

13. In a machine for making and' driving corrugated sheet metalfasteners, the combination of a feed device'for feeding the fastenerstock, said feed device comprising a sliding carrier, feed dogspivotally connected thereto and arranged to oppose each other'inoperation; corrugating dies juxtaposed to each other, of which dies oneis movable, a lever arm connected to the movable die to operate thesame; cutting blades juxtaposed to each other and to the corrugatingdies of which blades one is movable, a lever arm connected to themovable blade to operate the same; a plunger head; a prime mover shaft;means carried by the prime mover shaft to actuate the lever arm foroperating the corrugating dies and cutting blades respectively; meanscarried by the prime mover shaft to actuate the feed device; operativemeans connecting the prime mover shaft with the plunger head foractuating the prime mover shaft from the motion of the plunger head; andmeans for driving the fastener from the motion of the plunger head.

14:. In a fastener forming and driving mechanism, the combination ofdevices for feeding the stock and forming the fasteners, a plunger head,a plunger carried thereby, and arranged to drive the fastener home, aprime mover shaft, devices for actuating said stock feeding and fastenerforming devices from the prime mover shaft and means for driving theprime mover shaft from the motion of the plunger head.

15. In a fastener forming and driving mechanism, the combination ofdevices for feeding the stock and forming the fastener, a plunger head,a plunger carried thereby, and arranged to drive the fastener home, aprime mover shaft, devices for actuating said stock feeding and fastenerforming devices from the prime mover shaft, and means for driving theprime mover shaft from the motion of the plunger head, said means fordriving the prime mover shaft being inactive on the active stroke of theplunger.

16. In a fastener forming and driving mechanism, the combination ofdevices for feeding the stock and forming the fastener, a plunger head,a plunger carried thereby, and arranged to drive the fastener home, aprime mover shaft, devices for actuating said stock feeding and fastenerforming devices from the prime mover shaft, and means for driving theprime mover shaft from the motion of the plunger head, said means fordriving the prime mover shaft being inactive on the active stroke of theplunger, and having delayed operation upon the return stroke, to permitthe plunger to clear prime mover the fastener forming devices before theoperation thereof.

17 In a fastener forming and driving mechanism, the combination of meansfor feeding the stock and forming a fastener, a plunger head, a plungercarried thereby, and arranged to drive the fastener, a prime mover shaftfor actuating the stock feed and fastener forming means, a rack carriedby thev plunger head, a pinion loose on the prime mover shaft and meshedwith the rack, and pawl and ratchet devices for driving the shaft fromthe pinion upon the return motion of the plunger head.

18. In a machine of the class described, the combination of devices forfeeding a sheet metal strip, dies for corrugating a section of the saidstrip, blades for cutting the strip into suitable lengths and therebyforming a fastener, means for holding the fastener in position'duringthe driving operation; a plunger head, a plunger carried thereby; a rackcarried by the plunger head, a prime mover shaft, a pinion loose thereonand meshed with the rack, a carrier disk fastened to the pinion, acollar keyed to the prime mover shaft, pawl and ratchet devices on saidcarrier disk and said collar for imparting intermittent rotary motion tothe prime mover shaft, and means on the prime mover shaft for impartingintermittent reciprocating motion to the feeding devices and to actuatethe corrugating dies and cutting blades.

19. In a machine of the class described, the combination of a plungerhead, a rack carried by the plunger head, a prime mover shaft,,a pinionloose on the prime mover shaft and meshed with the rack, a carrier diskfast to the pinion, a shouldered collar keyed to the prime mover shaft,the collar having ratchet teeth to be engaged by the pawl on the carrierdisk and thereby impart intermittent rotary motion to the shaft throughthe pinion, from the motion of the plunger head, devices acting to feeda sheet metal strip, a yoke and reach rod to impart intermittent motionto said feeding devices, a race cam on the prime mover shaft to operatethe yoke and reach rod; corrugating dies acting to corrugate a sectionof the sheet metal strip; cutting blades to sever the corrugated sectionand thus form a fastener; lever arms for operating the corrugating diesand cutting blades respectively; jaws for holding the fastener inposition during the driving operation; cams on the prime mover shaft tooperate the lever arms; and a plunger carried by the plunger head andarranged to drive the fastener into the material to be fastened.

20. In a machine for making and driving sheet metal fasteners, thecombination of devices for feeding the stock, dies capable of acting onthe stock to deflect and thus form curves, angles or corrugations there-'name to this specification in the presence in, means for severing thestock into lengths, of two subscribing itnesses.

means for automatically driving the fas- SAMUEL E H M tener edgeWiseinto Wood, and devices for 5 yieldingly holding the fastener during theWitnesses: .7 driving operation. v r DUNNELLE VAN SOHAIGK, In testimonywhereof I have signed my EUGENE S. MACDONALD,

Copies of this patent maybe obtained for five cents each, by addressingthe. Commissioner of Patentl.

, Washington. I). c."

